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Diffstat (limited to 'libstdc++-v3/src/locale_init.cc')
| -rw-r--r-- | libstdc++-v3/src/locale_init.cc | 474 |
1 files changed, 474 insertions, 0 deletions
diff --git a/libstdc++-v3/src/locale_init.cc b/libstdc++-v3/src/locale_init.cc new file mode 100644 index 000000000..98c228cf1 --- /dev/null +++ b/libstdc++-v3/src/locale_init.cc @@ -0,0 +1,474 @@ +// Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, +// 2009, 2010 +// Free Software Foundation, Inc. +// +// This file is part of the GNU ISO C++ Library. This library is free +// software; you can redistribute it and/or modify it under the +// terms of the GNU General Public License as published by the +// Free Software Foundation; either version 3, or (at your option) +// any later version. + +// This library is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +// GNU General Public License for more details. + +// Under Section 7 of GPL version 3, you are granted additional +// permissions described in the GCC Runtime Library Exception, version +// 3.1, as published by the Free Software Foundation. + +// You should have received a copy of the GNU General Public License and +// a copy of the GCC Runtime Library Exception along with this program; +// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see +// <http://www.gnu.org/licenses/>. + +#include <clocale> +#include <cstring> +#include <cstdlib> // For getenv, free. +#include <cctype> +#include <cwctype> // For towupper, etc. +#include <locale> +#include <ext/concurrence.h> + +namespace +{ + __gnu_cxx::__mutex& + get_locale_mutex() + { + static __gnu_cxx::__mutex locale_mutex; + return locale_mutex; + } + + using namespace std; + + typedef char fake_locale_Impl[sizeof(locale::_Impl)] + __attribute__ ((aligned(__alignof__(locale::_Impl)))); + fake_locale_Impl c_locale_impl; + + typedef char fake_locale[sizeof(locale)] + __attribute__ ((aligned(__alignof__(locale)))); + fake_locale c_locale; + + typedef char fake_name_vec[sizeof(char*)] + __attribute__ ((aligned(__alignof__(char*)))); + fake_name_vec name_vec[6 + _GLIBCXX_NUM_CATEGORIES]; + + typedef char fake_names[sizeof(char[2])] + __attribute__ ((aligned(__alignof__(char[2])))); + fake_names name_c[6 + _GLIBCXX_NUM_CATEGORIES]; + + typedef char fake_facet_vec[sizeof(locale::facet*)] + __attribute__ ((aligned(__alignof__(locale::facet*)))); + fake_facet_vec facet_vec[_GLIBCXX_NUM_FACETS]; + + typedef char fake_cache_vec[sizeof(locale::facet*)] + __attribute__ ((aligned(__alignof__(locale::facet*)))); + fake_cache_vec cache_vec[_GLIBCXX_NUM_FACETS]; + + typedef char fake_ctype_c[sizeof(std::ctype<char>)] + __attribute__ ((aligned(__alignof__(std::ctype<char>)))); + fake_ctype_c ctype_c; + + typedef char fake_collate_c[sizeof(std::collate<char>)] + __attribute__ ((aligned(__alignof__(std::collate<char>)))); + fake_collate_c collate_c; + + typedef char fake_numpunct_c[sizeof(numpunct<char>)] + __attribute__ ((aligned(__alignof__(numpunct<char>)))); + fake_numpunct_c numpunct_c; + + typedef char fake_num_get_c[sizeof(num_get<char>)] + __attribute__ ((aligned(__alignof__(num_get<char>)))); + fake_num_get_c num_get_c; + + typedef char fake_num_put_c[sizeof(num_put<char>)] + __attribute__ ((aligned(__alignof__(num_put<char>)))); + fake_num_put_c num_put_c; + + typedef char fake_codecvt_c[sizeof(codecvt<char, char, mbstate_t>)] + __attribute__ ((aligned(__alignof__(codecvt<char, char, mbstate_t>)))); + fake_codecvt_c codecvt_c; + + typedef char fake_moneypunct_c[sizeof(moneypunct<char, true>)] + __attribute__ ((aligned(__alignof__(moneypunct<char, true>)))); + fake_moneypunct_c moneypunct_ct; + fake_moneypunct_c moneypunct_cf; + + typedef char fake_money_get_c[sizeof(money_get<char>)] + __attribute__ ((aligned(__alignof__(money_get<char>)))); + fake_money_get_c money_get_c; + + typedef char fake_money_put_c[sizeof(money_put<char>)] + __attribute__ ((aligned(__alignof__(money_put<char>)))); + fake_money_put_c money_put_c; + + typedef char fake_timepunct_c[sizeof(__timepunct<char>)] + __attribute__ ((aligned(__alignof__(__timepunct<char>)))); + fake_timepunct_c timepunct_c; + + typedef char fake_time_get_c[sizeof(time_get<char>)] + __attribute__ ((aligned(__alignof__(time_get<char>)))); + fake_time_get_c time_get_c; + + typedef char fake_time_put_c[sizeof(time_put<char>)] + __attribute__ ((aligned(__alignof__(time_put<char>)))); + fake_time_put_c time_put_c; + + typedef char fake_messages_c[sizeof(messages<char>)] + __attribute__ ((aligned(__alignof__(messages<char>)))); + fake_messages_c messages_c; + +#ifdef _GLIBCXX_USE_WCHAR_T + typedef char fake_wtype_w[sizeof(std::ctype<wchar_t>)] + __attribute__ ((aligned(__alignof__(std::ctype<wchar_t>)))); + fake_wtype_w ctype_w; + + typedef char fake_wollate_w[sizeof(std::collate<wchar_t>)] + __attribute__ ((aligned(__alignof__(std::collate<wchar_t>)))); + fake_wollate_w collate_w; + + typedef char fake_numpunct_w[sizeof(numpunct<wchar_t>)] + __attribute__ ((aligned(__alignof__(numpunct<wchar_t>)))); + fake_numpunct_w numpunct_w; + + typedef char fake_num_get_w[sizeof(num_get<wchar_t>)] + __attribute__ ((aligned(__alignof__(num_get<wchar_t>)))); + fake_num_get_w num_get_w; + + typedef char fake_num_put_w[sizeof(num_put<wchar_t>)] + __attribute__ ((aligned(__alignof__(num_put<wchar_t>)))); + fake_num_put_w num_put_w; + + typedef char fake_wodecvt_w[sizeof(codecvt<wchar_t, char, mbstate_t>)] + __attribute__ ((aligned(__alignof__(codecvt<wchar_t, char, mbstate_t>)))); + fake_wodecvt_w codecvt_w; + + typedef char fake_moneypunct_w[sizeof(moneypunct<wchar_t, true>)] + __attribute__ ((aligned(__alignof__(moneypunct<wchar_t, true>)))); + fake_moneypunct_w moneypunct_wt; + fake_moneypunct_w moneypunct_wf; + + typedef char fake_money_get_w[sizeof(money_get<wchar_t>)] + __attribute__ ((aligned(__alignof__(money_get<wchar_t>)))); + fake_money_get_w money_get_w; + + typedef char fake_money_put_w[sizeof(money_put<wchar_t>)] + __attribute__ ((aligned(__alignof__(money_put<wchar_t>)))); + fake_money_put_w money_put_w; + + typedef char fake_timepunct_w[sizeof(__timepunct<wchar_t>)] + __attribute__ ((aligned(__alignof__(__timepunct<wchar_t>)))); + fake_timepunct_w timepunct_w; + + typedef char fake_time_get_w[sizeof(time_get<wchar_t>)] + __attribute__ ((aligned(__alignof__(time_get<wchar_t>)))); + fake_time_get_w time_get_w; + + typedef char fake_time_put_w[sizeof(time_put<wchar_t>)] + __attribute__ ((aligned(__alignof__(time_put<wchar_t>)))); + fake_time_put_w time_put_w; + + typedef char fake_messages_w[sizeof(messages<wchar_t>)] + __attribute__ ((aligned(__alignof__(messages<wchar_t>)))); + fake_messages_w messages_w; +#endif + + // Storage for "C" locale caches. + typedef char fake_num_cache_c[sizeof(std::__numpunct_cache<char>)] + __attribute__ ((aligned(__alignof__(std::__numpunct_cache<char>)))); + fake_num_cache_c numpunct_cache_c; + + typedef char fake_money_cache_c[sizeof(std::__moneypunct_cache<char, true>)] + __attribute__ ((aligned(__alignof__(std::__moneypunct_cache<char, true>)))); + fake_money_cache_c moneypunct_cache_ct; + fake_money_cache_c moneypunct_cache_cf; + + typedef char fake_time_cache_c[sizeof(std::__timepunct_cache<char>)] + __attribute__ ((aligned(__alignof__(std::__timepunct_cache<char>)))); + fake_time_cache_c timepunct_cache_c; + +#ifdef _GLIBCXX_USE_WCHAR_T + typedef char fake_num_cache_w[sizeof(std::__numpunct_cache<wchar_t>)] + __attribute__ ((aligned(__alignof__(std::__numpunct_cache<wchar_t>)))); + fake_num_cache_w numpunct_cache_w; + + typedef char fake_money_cache_w[sizeof(std::__moneypunct_cache<wchar_t,true>)] + __attribute__ ((aligned(__alignof__(std::__moneypunct_cache<wchar_t,true>)))); + fake_money_cache_w moneypunct_cache_wt; + fake_money_cache_w moneypunct_cache_wf; + + typedef char fake_time_cache_w[sizeof(std::__timepunct_cache<wchar_t>)] + __attribute__ ((aligned(__alignof__(std::__timepunct_cache<wchar_t>)))); + fake_time_cache_w timepunct_cache_w; +#endif +} // anonymous namespace + +namespace std _GLIBCXX_VISIBILITY(default) +{ +_GLIBCXX_BEGIN_NAMESPACE_VERSION + + locale::locale() throw() : _M_impl(0) + { + _S_initialize(); + + // Checked locking to optimize the common case where _S_global + // still points to _S_classic (locale::_S_initialize_once()): + // - If they are the same, just increment the reference count and + // we are done. This effectively constructs a C locale object + // identical to the static c_locale. + // - Otherwise, _S_global can and may be destroyed due to + // locale::global() call on another thread, in which case we + // fall back to lock protected access to both _S_global and + // its reference count. + _M_impl = _S_global; + if (_M_impl == _S_classic) + _M_impl->_M_add_reference(); + else + { + __gnu_cxx::__scoped_lock sentry(get_locale_mutex()); + _S_global->_M_add_reference(); + _M_impl = _S_global; + } + } + + locale + locale::global(const locale& __other) + { + _S_initialize(); + _Impl* __old; + { + __gnu_cxx::__scoped_lock sentry(get_locale_mutex()); + __old = _S_global; + __other._M_impl->_M_add_reference(); + _S_global = __other._M_impl; + const string __other_name = __other.name(); + if (__other_name != "*") + setlocale(LC_ALL, __other_name.c_str()); + } + + // Reference count sanity check: one reference removed for the + // subsition of __other locale, one added by return-by-value. Net + // difference: zero. When the returned locale object's destrutor + // is called, then the reference count is decremented and possibly + // destroyed. + return locale(__old); + } + + const locale& + locale::classic() + { + _S_initialize(); + return *(new (&c_locale) locale(_S_classic)); + } + + void + locale::_S_initialize_once() throw() + { + // 2 references. + // One reference for _S_classic, one for _S_global + _S_classic = new (&c_locale_impl) _Impl(2); + _S_global = _S_classic; + } + + void + locale::_S_initialize() + { +#ifdef __GTHREADS + if (__gthread_active_p()) + __gthread_once(&_S_once, _S_initialize_once); +#endif + if (!_S_classic) + _S_initialize_once(); + } + + // Definitions for static const data members of locale::_Impl + const locale::id* const + locale::_Impl::_S_id_ctype[] = + { + &std::ctype<char>::id, + &codecvt<char, char, mbstate_t>::id, +#ifdef _GLIBCXX_USE_WCHAR_T + &std::ctype<wchar_t>::id, + &codecvt<wchar_t, char, mbstate_t>::id, +#endif + 0 + }; + + const locale::id* const + locale::_Impl::_S_id_numeric[] = + { + &num_get<char>::id, + &num_put<char>::id, + &numpunct<char>::id, +#ifdef _GLIBCXX_USE_WCHAR_T + &num_get<wchar_t>::id, + &num_put<wchar_t>::id, + &numpunct<wchar_t>::id, +#endif + 0 + }; + + const locale::id* const + locale::_Impl::_S_id_collate[] = + { + &std::collate<char>::id, +#ifdef _GLIBCXX_USE_WCHAR_T + &std::collate<wchar_t>::id, +#endif + 0 + }; + + const locale::id* const + locale::_Impl::_S_id_time[] = + { + &__timepunct<char>::id, + &time_get<char>::id, + &time_put<char>::id, +#ifdef _GLIBCXX_USE_WCHAR_T + &__timepunct<wchar_t>::id, + &time_get<wchar_t>::id, + &time_put<wchar_t>::id, +#endif + 0 + }; + + const locale::id* const + locale::_Impl::_S_id_monetary[] = + { + &money_get<char>::id, + &money_put<char>::id, + &moneypunct<char, false>::id, + &moneypunct<char, true >::id, +#ifdef _GLIBCXX_USE_WCHAR_T + &money_get<wchar_t>::id, + &money_put<wchar_t>::id, + &moneypunct<wchar_t, false>::id, + &moneypunct<wchar_t, true >::id, +#endif + 0 + }; + + const locale::id* const + locale::_Impl::_S_id_messages[] = + { + &std::messages<char>::id, +#ifdef _GLIBCXX_USE_WCHAR_T + &std::messages<wchar_t>::id, +#endif + 0 + }; + + const locale::id* const* const + locale::_Impl::_S_facet_categories[] = + { + // Order must match the decl order in class locale. + locale::_Impl::_S_id_ctype, + locale::_Impl::_S_id_numeric, + locale::_Impl::_S_id_collate, + locale::_Impl::_S_id_time, + locale::_Impl::_S_id_monetary, + locale::_Impl::_S_id_messages, + 0 + }; + + // Construct "C" _Impl. + locale::_Impl:: + _Impl(size_t __refs) throw() + : _M_refcount(__refs), _M_facets(0), _M_facets_size(_GLIBCXX_NUM_FACETS), + _M_caches(0), _M_names(0) + { + _M_facets = new (&facet_vec) const facet*[_M_facets_size]; + _M_caches = new (&cache_vec) const facet*[_M_facets_size]; + for (size_t __i = 0; __i < _M_facets_size; ++__i) + _M_facets[__i] = _M_caches[__i] = 0; + + // Name the categories. + _M_names = new (&name_vec) char*[_S_categories_size]; + _M_names[0] = new (&name_c[0]) char[2]; + std::memcpy(_M_names[0], locale::facet::_S_get_c_name(), 2); + for (size_t __j = 1; __j < _S_categories_size; ++__j) + _M_names[__j] = 0; + + // This is needed as presently the C++ version of "C" locales + // != data in the underlying locale model for __timepunct, + // numpunct, and moneypunct. Also, the "C" locales must be + // constructed in a way such that they are pre-allocated. + // NB: Set locale::facets(ref) count to one so that each individual + // facet is not destroyed when the locale (and thus locale::_Impl) is + // destroyed. + _M_init_facet(new (&ctype_c) std::ctype<char>(0, false, 1)); + _M_init_facet(new (&codecvt_c) codecvt<char, char, mbstate_t>(1)); + + typedef __numpunct_cache<char> num_cache_c; + num_cache_c* __npc = new (&numpunct_cache_c) num_cache_c(2); + _M_init_facet(new (&numpunct_c) numpunct<char>(__npc, 1)); + + _M_init_facet(new (&num_get_c) num_get<char>(1)); + _M_init_facet(new (&num_put_c) num_put<char>(1)); + _M_init_facet(new (&collate_c) std::collate<char>(1)); + + typedef __moneypunct_cache<char, false> money_cache_cf; + typedef __moneypunct_cache<char, true> money_cache_ct; + money_cache_cf* __mpcf = new (&moneypunct_cache_cf) money_cache_cf(2); + _M_init_facet(new (&moneypunct_cf) moneypunct<char, false>(__mpcf, 1)); + money_cache_ct* __mpct = new (&moneypunct_cache_ct) money_cache_ct(2); + _M_init_facet(new (&moneypunct_ct) moneypunct<char, true>(__mpct, 1)); + + _M_init_facet(new (&money_get_c) money_get<char>(1)); + _M_init_facet(new (&money_put_c) money_put<char>(1)); + + typedef __timepunct_cache<char> time_cache_c; + time_cache_c* __tpc = new (&timepunct_cache_c) time_cache_c(2); + _M_init_facet(new (&timepunct_c) __timepunct<char>(__tpc, 1)); + + _M_init_facet(new (&time_get_c) time_get<char>(1)); + _M_init_facet(new (&time_put_c) time_put<char>(1)); + _M_init_facet(new (&messages_c) std::messages<char>(1)); + +#ifdef _GLIBCXX_USE_WCHAR_T + _M_init_facet(new (&ctype_w) std::ctype<wchar_t>(1)); + _M_init_facet(new (&codecvt_w) codecvt<wchar_t, char, mbstate_t>(1)); + + typedef __numpunct_cache<wchar_t> num_cache_w; + num_cache_w* __npw = new (&numpunct_cache_w) num_cache_w(2); + _M_init_facet(new (&numpunct_w) numpunct<wchar_t>(__npw, 1)); + + _M_init_facet(new (&num_get_w) num_get<wchar_t>(1)); + _M_init_facet(new (&num_put_w) num_put<wchar_t>(1)); + _M_init_facet(new (&collate_w) std::collate<wchar_t>(1)); + + typedef __moneypunct_cache<wchar_t, false> money_cache_wf; + typedef __moneypunct_cache<wchar_t, true> money_cache_wt; + money_cache_wf* __mpwf = new (&moneypunct_cache_wf) money_cache_wf(2); + _M_init_facet(new (&moneypunct_wf) moneypunct<wchar_t, false>(__mpwf, 1)); + money_cache_wt* __mpwt = new (&moneypunct_cache_wt) money_cache_wt(2); + _M_init_facet(new (&moneypunct_wt) moneypunct<wchar_t, true>(__mpwt, 1)); + + _M_init_facet(new (&money_get_w) money_get<wchar_t>(1)); + _M_init_facet(new (&money_put_w) money_put<wchar_t>(1)); + + typedef __timepunct_cache<wchar_t> time_cache_w; + time_cache_w* __tpw = new (&timepunct_cache_w) time_cache_w(2); + _M_init_facet(new (&timepunct_w) __timepunct<wchar_t>(__tpw, 1)); + + _M_init_facet(new (&time_get_w) time_get<wchar_t>(1)); + _M_init_facet(new (&time_put_w) time_put<wchar_t>(1)); + _M_init_facet(new (&messages_w) std::messages<wchar_t>(1)); +#endif + + // This locale is safe to pre-cache, after all the facets have + // been created and installed. + _M_caches[numpunct<char>::id._M_id()] = __npc; + _M_caches[moneypunct<char, false>::id._M_id()] = __mpcf; + _M_caches[moneypunct<char, true>::id._M_id()] = __mpct; + _M_caches[__timepunct<char>::id._M_id()] = __tpc; +#ifdef _GLIBCXX_USE_WCHAR_T + _M_caches[numpunct<wchar_t>::id._M_id()] = __npw; + _M_caches[moneypunct<wchar_t, false>::id._M_id()] = __mpwf; + _M_caches[moneypunct<wchar_t, true>::id._M_id()] = __mpwt; + _M_caches[__timepunct<wchar_t>::id._M_id()] = __tpw; +#endif + } + +_GLIBCXX_END_NAMESPACE_VERSION +} // namespace |